參數資料
型號： ST10F269Z2Q3
廠商： STMICROELECTRONICS
元件分類： 微控制器/微處理器
英文描述： 16-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQFP144
封裝： 28 X 28 MM, PLASTIC, QFP-144
文件頁數： 160/160頁
文件大小： 1541K
代理商： ST10F269Z2Q3
ST10F269
99/160
16 - REAL TIME CLOCK
The Real Time Clock is an independent timer,
which clock is directly derived from the clock
oscillator on XTAL1 input so that it can keep on
running even in Idle or Power down mode (if
enabled to). Registers access is implemented
onto the XBUS. This module is designed for the
following purposes:
– Generate the current time and date for the system
– Cyclic time based interrupt, provides Port
2 external interrupts every second and every
n seconds (n is programmable) if enabled.
– 58-bit timer for long term measurement
– Capable to exit the ST10 chip from power down
mode (if PWDCFG of SYSCON set) after a pro-
grammed delay.
The real time clock is base on two main blocks of
counters. The first block is a prescaler which
generates a basic reference clock (for example a
1 second period). This basic reference clock is
coming out of a 20-bit DIVIDER (4-bit MSB
RTCDH counter and 16-bit LSB RTCDL counter).
This 20-bit counter is driven by an input clock
derivated from the on-chip high frequency CPU
clock, predivided by a 1/64 fixed counter (see
Figure 51). This 20-bit counter is loaded at each
basic reference clock period with the value of the
20-bit PRESCALER register (4-bit MSB RTCPH
register and 16-bit LSB RTCPL register). The
value of the 20-bit RTCP register determines the
period of the basic reference clock.
A timed interrupt request (RTCSI) may be sent on
each basic reference clock period. The second
block of the RTC is a 32-bit counter (16-bit RTCH
and 16-bit RTCL). This counter may be initialized
with the current system time. RTCH/RTCL counter
is driven with the basic reference clock signal. In
order to provide an alarm function the contents of
RTCH/RTCL counter is compared with a 32-bit
alarm register (16-bit RTCAH register and 16-bit
RTCAL register). The alarm register may be
loaded with a reference date. An alarm interrupt
request (RTCAI), may be generated when the
value
of
RTCH/RTCL
counter
matches
the
reference date of RTCAH/RTCAL register.
The timed RTCSI and the alarm RTCAI interrupt
requests can trigger a fast external interrupt via
EXISEL register of port 2 and wake-up the ST10
chip when running power down mode. Using the
RTCOFF bit of RTCCON register, the user may
switch off the clock oscillator when entering the
power down mode.
Figure 50 : ESFRs and Port Pins Associated with the RTC
Figure 51 : RTC Block Diagram
--
-
-- Y Y Y Y ----
EXISEL
EXISEL External Interrupt Source Selection register (Port 2)
1 second timed interrupt request (RTCSI) triggers firq[2] and alarm interrupt request (RTCAI) triggers firq[3]
RTC data and control registers are implemented onto the XBUS.
--
-
- - YYYYYYYY
CCxIC
/64
RTCPL
RTCPH
RTCH
RTCL
RTCDH
RTCDL
RTCAH
RTCAL
Clock Oscillator
Reload
=
20 bit DIVIDER
32 bit COUNTER
RTCCON
AlarmIT
Basic Clock IT
RTCAI RTCSI
Programmable ALARM Register
Programmable PRESCALER Register
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相關代理商/技術參數
參數描述
ST10F269Z2Q6 功能描述:16位微控制器 - MCU 256K Flash 12K RAM RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數據總線寬度:16 bit 最大時鐘頻率:24 MHz 程序存儲器大小:8 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風格:SMD/SMT
ST10F269Z2Q6/TR 功能描述:16位微控制器 - MCU 16B MCU 256K Byte and 12K Byte RAM RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數據總線寬度:16 bit 最大時鐘頻率:24 MHz 程序存儲器大小:8 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風格:SMD/SMT
ST10F269Z2QX 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:16-BIT MCU WITH MAC UNIT, 256K BYTE FLASH MEMORY AND 12K BYTE RAM
ST10F269Z2T3 功能描述:16位微控制器 - MCU ST10F272 16B MCU RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數據總線寬度:16 bit 最大時鐘頻率:24 MHz 程序存儲器大小:8 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風格:SMD/SMT
ST10F269Z2T6 功能描述:16位微控制器 - MCU ST10F272 16B MCU RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數據總線寬度:16 bit 最大時鐘頻率:24 MHz 程序存儲器大小:8 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風格:SMD/SMT
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